General Information
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| Chemical Formula: |
KBa(Al,Sc)(Mg,Fe++)6Si6O20F2 |
| IMA Status: |
Approved IMA 1965 |
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Classification
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| Dana Class: |
69.2.1c.1 (69)Chains with Side Branches or Loops (69.2)with P>2 (69.2.1c)Aenigmatite and related species (Magbasite subgroup) |
| Strunz Class: |
VIII/C.32-10 - Silicates [Sorosilicates with [Si3O10]8- groups (Magbasite series).] |
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Crystallography
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| Crystal System: |
Unknown |
| X Ray Diffraction: |
By Intensity(I/Io): 3.2(1) 3.63(1) 2.59(0.8) |
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Physical Properties
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| Color: |
colorless or pink violet. |
| Density: |
3.41 |
| Diaphaniety: |
Transparent |
| Hardness: |
5 - Apatite |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties
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| Optical Data: |
Biaxial (-), a=1.597, b=1.609, g=1.615, bire=0.0180, 2V(Calc)=70, 2V(Meas)=70. |
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Other Information
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
 Athena Mineralogy |
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Frederic Biret |
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Google |
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MinMax |
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École des Mines de Paris |
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